滚动的公告

遍历数组运用 setInterval 来对数组循环

<template>
  <div class="gonggao">
    <ul class="list">
      <li
        v-for="(item, index) in yjList"
        :key="item.id"
        :class="!index && play ? 'toUp' : ''"
        style="display: flex"
      >
        <img src="../../assets/image/warn.png" alt="" />
        {
   
   { item.yjname }} {
   
   { item.time }}
      </li>
    </ul>
  </div>
</template>

<script>
export default {
  mounted() {
    setInterval(this.startPlay, 2000);
  },
  props: {
    yjList: {
      type: Array,
      default: [],
    },
  },
  data() {
    return {
      ulList: [],
      play: false,
    };
  },
  methods: {
    startPlay() {
      let that = this;
      that.play = true; //开始播放
      setTimeout(() => {
        that.ulList.push(that.ulList[0]); //将第一条数据塞到最后一个
        that.ulList.shift(); //删除第一条数据
        that.play = false; //暂停播放,此处修改，保证每一次都会有动画显示
      }, 500);
    },
  },
};
</script>

<style  scoped>
.gonggao {
  position: absolute;
  width: 35%;
  height: 70px;
  top: 80px;
  left: 50%;
  transform: translate(-50%, 0%);
  color: #fff;
  border-radius: 5px;
  background: url("../../assets/image/gonggao.png") no-repeat;
  background-size: 100% 100%;
}
.toUp {
  margin-top: -40px;
  transition: all 0.5s;
}

.list {
  list-style: none;
  width: 80%;
  text-align: center;
  overflow: hidden;
  height: 40px;
  margin: 21px auto;
  font-size: 17px;
}
.list img {
  width: 25px;
  height: 25px;
  margin-top: 12px;
  margin-right: 10px;
}
li {
  text-align: left;
  height: 40px;
  line-height: 49px;
  font-weight: 600;
}
</style>